State certification as a factor in the training of elementary teachers-in-service ...
APA Citation
Yeager, W. Allison. (1929). State certification as a factor in the training of elementary teachers-in-service ... Philadelphia.
MLA Citation
Yeager, William Allison. State Certification As a Factor In the Training of Elementary Teachers-in-service ... Philadelphia, 1929.
Warning: These citations may not always be complete (especially for serials).